private void ExecuteSparql()
{
SummaryMessage = "Running query...";
ResultColumnNames.Clear();
SparqlQueryResultsString = String.Empty;
QueryResultsTable = null;
if (Store == null)
{
Messages = "No target store selected.";
return;
}
ThreadPool.QueueUserWorkItem(RunSparqlQuery);
}
private void ExecuteSparql()
{
SummaryMessage = "Running query...";
ResultColumnNames.Clear();
SparqlQueryResultsString = String.Empty;
QueryResultsTable = null;
if (Store == null)
{
Messages = "No target store selected.";
return;
}
XDocument sparqlResults;
try
{
var timer = new Stopwatch();
timer.Start();
sparqlResults =
Store.ExecuteSparql(
String.IsNullOrEmpty(SelectedQueryString) ? SparqlQueryString : SelectedQueryString,
TargetCommitPoint);
timer.Stop();
ErrorOccurred = false;
TimeTaken = timer.ElapsedMilliseconds;
}
catch (RdfParseException parseException)
{
SummaryMessage = "Parse error - see message tab for details.";
Messages = "Parse error: " + parseException.Message;
return;
}
catch (SparqlQueryException sqe)
{
SummaryMessage = "Query error - see message tab for details.";
Messages = sqe.ToString();
return;
}
catch (Exception ex)
{
SummaryMessage = "Query error - see message tab for details.";
Messages = "Error running SPARQL query. " + ex.Message;
return;
}
if (sparqlResults != null)
{
var resultsTable = new DataTable();
SparqlQueryResultsString = sparqlResults.ToString();
RowsReturned = sparqlResults.SparqlResultRows().Count();
if (sparqlResults.Root != null)
{
XElement sparqlQueryResults = sparqlResults.Root.Element(SparqlResultsNs + "results");
XElement head = sparqlResults.Root.Element(SparqlResultsNs + "head");
if (sparqlQueryResults != null && head != null)
{
foreach (
XAttribute n in
from v in
head.Elements(SparqlResultsNs + "variable")
select v.Attribute("name"))
{
if (n != null)
{
ResultColumnNames.Add(n.Value);
resultsTable.Columns.Add(n.Value);
}
}
}
if (ResultColumnNames.Count > 0)
{
int colCount = resultsTable.Columns.Count;
foreach (XElement row in sparqlResults.SparqlResultRows())
{
var rowData = new object[colCount];
for (int i = 0; i < colCount; i++)
{
rowData[i] = row.GetColumnValue(resultsTable.Columns[i].ColumnName);
}
resultsTable.Rows.Add(rowData);
}
}
QueryResultsTable = resultsTable;
}
Messages = "Query executed successfully.";
SummaryMessage = String.Format("Query returned {0} rows in {1}ms", RowsReturned, TimeTaken);
}
else
{
RowsReturned = 0;
Messages = "Query executed successfully.";
SummaryMessage = String.Format("Query executed in {0}ms", TimeTaken);
}
}